a = 1
while a <= 100:
    print("今天是第", a)
    a = a + 1

n = 1
sum = 0
while n <= 100:
    sum = sum + n
    n = n + 1
    # print(sum)
print(sum)

for i in 'python':
    print(i)

for i in range(10):
    print(i)
    print()



 #嵌套循环
i = 1
while i <= 5:
    print("上班星期为：",i)
    i = i+1
    t = 9
    while t <= 17:
        print("时间段：",t,end="")
        t = t+1
    print()

for i in range(1,6):
    print('上班为周：',i)
    for t in  range(9,18):
        print('时间段为：', end="")
    print()

#九九乘法表
i = 1
while i <= 9:
    j = 1
    while j <= i:
        print('%d*%d=%d' % (j, i, j*i), end=" ")
        j = j + 1
    print()
    i = i + 1

    

for i in range(1,10):
    for j in range(1,1+i):
        print('%d*%d=%d' % (j, i, j*i), end=" ")
    print()


